Power Supply and Ground Circuit Check for NAVI Control Unit

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE
Check that the following fuses of the NAVI control unit are not blown.

Fig 1: Navi Control Unit Fuses Reference
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 2.
- NG: If fuse is blown, be sure to eliminate case of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
POWER SUPPLY CIRCUIT CHECK
Check voltage between the following harness connector terminals and ground.

Fig 2: NAVI Control Unit Connector M57 Terminals 3, 6, 2 & Ground Voltage Specification Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: NAVI Control Unit Connector M57 Terminals 3, 6, 2 & Ground Voltage Test
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 3.
- NG: Check harness for open or short between NAVI control unit and fuse.
GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector.
3. Check continuity between NAVI control unit harness connector and ground.
  
  Fig 4: Navi Control Unit Connector M53 Terminals 1,4, & Ground Continuity Specifications Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Navi Control Unit Connector M53 Terminals 1,4, & Ground Continuity Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Inspection end.
- NG: Repair harness or connector.